The comment below states that clementines are easily hybridized and CA growers threatened to sue beekeepers. While both statements may be true, CA growers did not threaten to sue beekeepers because the trees are easily hybridized, it is because, when they are polinated by bees they are no longer "seedless" and often have many seeds. They are less marketable with seeds, thus hurting their livihood.

Also, my personal opinion is that clementines are the most inferior of the commonly marketed mandarines. They are very sweet with little flavor. Satsuma and Dancy have a better tart/sweet combination.